#pragma once

#include<iostream>
#include<queue>
#include"LockGuard.hpp"
using namespace std;

const int defaultcap = 5;

template<class T>
class BlockQueue
{
public:
    BlockQueue(int cap = defaultcap)
        :_capacity(cap)
    {
        pthread_mutex_init(&_mutex, nullptr);
        pthread_cond_init(&_p_cond, nullptr);
        pthread_cond_init(&_c_cond, nullptr);
    }

    bool IsFull()
    {
        return _q.size() == _capacity;
    }

    bool IsEmpty()
    {
        return _q.size() == 0;
    }

    void Push(const T& in)//生产者生产数据
    {
        LockGuard lockguard(&_mutex);
        while(IsFull())
        {
            pthread_cond_wait(&_p_cond, &_mutex);
        }
       
       _q.push(in);
       pthread_cond_signal(&_c_cond);
    }

    void Pop(T* out)//消费者消费数据
    {
        LockGuard lockguard(&_mutex);
        while(IsEmpty())
        {
            pthread_cond_wait(&_c_cond, &_mutex);
        }

        *out = _q.front();
        _q.pop();
        pthread_cond_signal(&_p_cond);
    }

    ~BlockQueue()
    {
        pthread_mutex_destroy(&_mutex);
        pthread_cond_destroy(&_p_cond);
        pthread_cond_destroy(&_c_cond);
    }

private:
    queue<T> _q;
    int _capacity;
    pthread_mutex_t _mutex;
    pthread_cond_t _p_cond; //生产者的条件变量
    pthread_cond_t _c_cond; /* 消费者的条件变量 */
};